Great indigo blue color effect on the pond pics. We have a couple green herons and they have not caused any effect that I can id. I keep a healthy RES population to offset any parasites that may come via the wading birds.
I bet a few months ago you may have been thinking about fish balance in the pond but not about balancing time between ponding and posting. Welcome to the club!
We have a couple green herons and they have not caused any effect that I can id. I keep a healthy RES population to offset any parasites that may come via the wading birds. 
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